Art of producing from foundry-iron a product having cutting and other properties of high-grade tool and high-speed steel.



E. A DUSTER. ART OF PBODUOING FBOM FOUNDRY IBON A PRODUCT HAVING CUTTING AND OTHER PROPERTIES OF HIGH GRADE TOOL AND HIGH SPEED STEEL.

APPLICATION FILED DBO. 11,1908.

' Patented July 13, 1909.

l TTDRHEY.

nNrTEnsTATEs PAIENT oFFroa. i I

EDGAR ALA-N ovarian, or: PHILADELPHIA, PENNSYLVANIA, AssIaN'oR To THE CUSTER SANDLESS GASTING COMIEANY, A CORPORATION OF, DELAWARE.

ear or rnonuome raou s'ommnv mon A rnonucr zu'vnqe our'rmeann o'rrmn PBOPBI'IIE B' OF HIGH-GRADE TOOL AND HIGH-SPEED STEEL.

Specification of Letters Patent.

Patented July 13, 1909.

Application filed December 11, 1908. Q Serial No. 466,968. I

i To all whom may concern:

Beit known that I, EDGAR ALAN CUSTER,

a citizen of the UnitedStates, residing at "the city' of llhiladelphia, in the county of .Philadelphia and State of Pennsylvania,

have invented certain newand. useful imrovements 1n the art of speed steel,-of which the following is a specification;

My invention has relation'to the art of producing a product having the cutting andother properties of high speed and high grade tool steel, from ordinary foundry-iron,

y chilling such iron while in a molten state swiftly to the point of setting in a permanent sectional metal mold in a solid structure,

then removing from the mold and immersing cutting and other ualities, to the present v high grade to ol; and igh speed steel of commerce.

My invention basically considered, consists of producing from foundry-iron, a homogeneous product having the com osition, strenfih, cutting and other .quaii of the high grade tool steel of commerce," by

chilling molten foundry-iron in a permanent metal mold to the point of setting in asolid structure, then removing from the mold and chilling quickly in a fluid .bath, for use, such as tool making and many other uses.

The nature and general sco e of my present invention will be more fu y understood from .the following description taken in conment, in the carrying into effecto pour-holes b, located about the meeting nection with the accompanying drawing formin part hereof, illustrating diagrammatica ly a type of plant adapted for em logmethod of my said invention Referring'to the drawing], represents an ordinary -cupola-furnace. provided with a ouring spout a, and ladle a, located in proximity to a permanent sectional metal mold 2, consisting of'a cope b, and drag b, having edges of two sections of the mold 2, and

producing from OUDLlIy-QIOH a product havlngcutting and other properties of high-grade tool and highties having internal channelways, not shown, directly leading to a central cavity 6 of any required shape or form, according .to the she e of the solid structure to be cast in the mo d. The molten metal from the cupola furnace 1, passes by the pouring-s outc, into the ladle a), and thence into t 1e mold 2, and therein it isswiftly chilled to the point of setting, covering as to time but a few moments, when the mold is automatically 0 ened by the parting of the cope b, from t e drag b if a horizontal mold, as shown,

or if a vertical mold, one part or section is a separated from the other part or section, to

enable the cast structure set in the mold to be removed immediately after being cast, for the instant'removed to be immersed in a cold water tank 3, so as to chill. suddenly the hot structure, 'to a cold state. Practicehas demonstrated that this effect upon. ordinary foundry-iron, when so treated is to fix the changed molecular conditions, that is,.t0 give a fine texture thereto, and to establish throughout a homogeneity to the structure cast which is fully accomplished by the chilling of themolten foundry-iron, first in-the permanent metal mold swiftly, to establish the defined homogeneity to the structure; and second the cooling thereafter quickly of the solid structure cast, by immersing the same in a cold water bath, fixes reliably throughout the homogeneity of the structure.

and reasonably low in sulfur and nliosphor- 100 one has been found, when brought into a" solid cast structural form, by the method hereinbefore fully described, to given product new in the art for tool making, machining and threading different structures for use in 105 the applied arts. l

Having thus described my invention 1 claim:

The character of the structure Y east In such manner 18 iound to compare .metal mold swiftly to the oint 0 setting in a solid structure and t ereafter chil' 1. The art of roducing tool and other metal from foun ry-iron, which consists in chilling molten foundry-iron in a ermanent 1n uickly in a fluid bath, substantially as an or the purposes described.

2. The 'art of roducing tool and other metal from foun ry-iron, which consists in pouring molten foundry-iron and chillin swiftly in apermanent sectional metal mold to the point of setting in a solid structure and then quickly cooling in a fluid bath to reliably fix the homogeneity oh the structure established in passing from the molten to the solid state, substantially as and for the purposes described.

3. The art of producing tool or other metal, from foundry-iron, which consists in pouring molten foundry-iron into a permanent metal mold and chilling swiftly therein to the point of setting in a solid structure emgcee and then removin instantly when set in the pouring such molten metal to which previ-' ously has been added a certain percentage oftungsten, nickel, vanadium, titanium or other metallic substances or alloys thereto into a permanent metal mold, chilling swiftly to the oint of setting in a solid structure and therea ter chilling quickly in a fluid bath to obtain a product of the quality of high speed or high grade tool steel, substantially as and for the purposes described.

In witness whereof, I have hereunto set my signature in the presence of two subscribing witnesses. V

EDGAR ALAN CUSTER.

Witnesses:

J. WALTER DoUGLAss, THoMAsM. SMITH. 

